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An Asahi Kasei Group Company.
©2022 Senseair AB. All rights reserved.
Document: PSH3444 Rev: 5
Senseair S8
Commercial
A very small, versatile and
mass-producible CO
2
transmitter module
More than 25 years experience of research and
development within the eld of infrared gas sensing has
now brought us the smallest CO2 sensor, with NDIR-
technique, in the world – Senseair S8 Commercial. The
new sensor has excellent performance such as high
accuracy and low power consumption.
Senseair S8 Commercial is designed for high volume
production with full traceability by sensor serial number
on all manufacturing processes and key components.
Every sensor is individually calibrated and is provided
with UART digital interface. The sensor has an estimated
life time of more than 15 years.
Senseair S8 Commercial is a module that is designed
for simple integration into products. Senseair S8
Commercial can be used in a wide range of applications
such as in ventilation control to improve energy savings
and to assure a good indoor climate. Other elds of
use are personal safety and measurements to increase
process yield and to increase economic value in bio-
related processes.
Key benets
• Miniature size
• Individually calibrated
• Maintenance-free
• Long term stability
• Low power consumption
Note 1: Accuracy is specied over operating temperature range. Specication is referenced
to certied calibration mixtures. Uncertainty of calibration gas mixtures (±1%
currently) is to be added to the specied accuracy for absolute measurements.
Standard specication
Measured gas Carbon dioxide (CO
2
)
Operating Principle Non-dispersive infrared
(NDIR)
Measurement range CO
2
400 – 2000 ppm
Accuracy CO
2
±30 ppm ±3% of reading
1, 2
Maintenance No maintenance required
Life Expectancy >15 years
Power supply 4.5 – 5.25 V DC
Operation temperature range 0 – 50 °C
Communication UART (Modbus)
Dimensions 33.9 x 19.8 x 8.7 mm
Energy consumption 300 mA peak
30 mA average
Response time 2 minutes by 90%
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An Asahi Kasei Group Company.
©2022 Senseair AB. All rights reserved.
Document: PSH3444 Rev: 5
Senseair S8 Commercial Technical Specication
General Sensor Performance:
Required storage/operation environment Non-corrosive and non-condensing
Sensor lifetime expectancy >15 years
Maintenance Maintenance-free for normal indoor applications with Senseair ABC on
1
Self-diagnostics A full system test is executed automatically every time the power is turned ON
Operative environment required for keeping calibrated and specied accuracy in gas measurement
Operative temperature range 0 – 50 °C
Operative relative humidity range 0 – 85% RH, non-condensing
Electrical Properties:
Power supply 4.5 – 5.25 V unprotected against surges and reverse connection
Power consumption 300 mA peak, 30 mA average
Mechanical Properties:
Electrical connections DVCC, G+ and G0
Dimensions 33.9 x 19.8 x 8.7 mm (Max. Length x Width x Height)
CO
2
Measurement:
Operating principle Non-dispersive infrared (NDIR)
Measurement range 400 – 2000 ppm, up to 10000 ppm extended range
2
Accuracy ±30 ppm ±3% of reading
3
Measurement interval 2 seconds
Note 1: Optional calibrations are background calibration, which requires that the sensor
is exposed to fresh air (400 ppm CO
2
) and zero calibration, which requires the
sensor measuring cell to be completely evacuated from CO
2
e.g. by exposing
it to Nitrogen or Soda Lime CO
2
scrubbed air.
Note 2: Optional
Note 3: Accuracy is specied over operating temperature range. Specication is refer
enced to certied calibration mixtures. Uncertainty of calibration gas mixtures
(±1% currently) is to be added to the specied accuracy for absolute measurements.